Invisible graphics context identifying system and fabrication method thereof

ABSTRACT

The discrimination system of the cryptic graph-text document and manufacturing method thereof is to digitize and decompose the cryptic document and fix them onto the surfaces of the digital reader and printed sheet, which present themselves as the cryptic documents. An array of numerous miniaturized lenses with specific focal lengths is distributed on the surface of the reader. When the printed sheet is covered with a specific digital reader at a specific location, the corresponding document is revealed and presents as the original document and alternating the darkness of the pattern from heavy to light and from invisible to visible gradually while changing the visual angle. Several digital readers are matched to one printed sheet, resulting in different cryptic patterns accordingly. The discrimination system is intuitive, simple and speedy, and is difficult to imitate. This technique is good for making licenses, bills, money notes, stamps, packages of goods, and all others that require anti-counterfeiting marks attached.

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a system and method for the preventionof counterfeiting graphs and texts, and more particularly relates to adiscrimination system of cryptic graphs-texts and a producing methodthereof.

BACKGROUND OF THE INVENTION

In the commodity circulation, the institution of effective supervisorysystem and the questioning of the genuineness of the commodity are graveconcerned by all countries. Practically, consumers are often confused bya large variety of imitation articles. The interests of most consumersand the manufacturers are infringed seriously, and consumers cannot findan effective way for distinguishing between genuine and imitation. Theymay even hesitate to buy, and the reputation of the manufacturers isinjured unjustly. Due to the forcible action of the imitation articles,the market for famous products even shrinks seriously and theirproducers are forced to change the packaging and to make advertisementsagain and again, and expenses increase accordingly. On the other hand,the new imitation articles themselves are changed very soon. Often, theproducers of the imitation articles have not been charged and they oftenget exorbitant profits. The related government agencies spend a lot offinancial and very often they are alleviating symptoms only and do noteffect a permanent cure. Of recent years, several measures such asso-called visional 3D labels or laser labels have been used, to resistthe imitations and those labels are imitated again. People are lookingfor better anti-counterfeiting labels.

So far, the prior art for anti-counterfeiting patterns have used thecombination of parallel streaky lines of different angle forming thecryptic graph-text patterns only. With small difference of differentangles the pattern is revealed. By the use of parallel streaky gratingsas a reader and placing the grating on the cryptic pattern with therelative correlation of two groups of streaks, the original pattern canalso be seen. But the correlation is easy to be recognized; thus thecounterfeiting pattern is easy to be imitated.

SUMMARY OF THE INVENTION

The present invention puts forward a discrimination system of a crypticgraph-text pattern and the producing method thereof. By the use of the4D (4 parameters) technique it is possible to produce multiplegraph-text combination in one copy, which increases the number of levelsfor anti-counterfeit and is more difficult to be decoded and imitated.This system can be connected to a compatible computer system forsupervision and discrimination. Thus the pattern can also be readvisually or by computer.

The technical solution of the invention is described as follows: Thecryptic graph-text discrimination system includes a printed sheet anddigital readers. On the surface of the printed sheet, there ishigh-density dot group of the complete cryptic document that is composedby plural cryptic documents and each of them is treated by a decomposingand digitizing technique. The sheet is made of transparent, translucentor non-transparent material. The high-density dot groups can also beprinted on both sides of the sheet and in that case the sheet is made oftransparent or translucent material.

The surface of the reader, as a whole or divided by several parts, iscovered by different kind of omni-directional lens arrays and thesurface of the vein is uneven or is smooth and many miniaturized lenseswith specific focal lengths are distributed. All lenses are made ofconvex lenses or holes or both of them. The lenses are arranged inaccordance with the pattern of the high-density dot groups of theindividual cryptic graph-text document that is one of the digitized anddecomposed cryptic graph-text documents.

The arrangement of the miniaturized lenses on the omni directional lensarray is in grid form, in step shape, in wavelike pattern, or of specialcombination.

The digitized reader is made of transparent or translucent material suchas plastic or colloid and can be a rigid card or a flexible card, andsome other cryptic patterns are also fixed on the surface near theedges.

The above-mentioned printed sheet can be fixed on licenses,certificates, sealing strips, credit cards, different magnetic cards,computer software, hard discs, LDs, stamps, money notes, bills,receipts, birth certificates, contracts, permits, documents for clearingcustoms, packages of products, and can also be fixed on porcelain,metal, glass, molded plastic articles, wooden articles and dressmaterial.

The procedure of producing the cryptic graph-text discrimination systemis as follows:

-   -   a. Enciphering/digitizing the visible and cryptic graph-text        documents step by step by the use of randomly generated        enciphering system. Enciphering parameters of the multivariate        function are assigned in each step, and then the parameters are        deleted before the next step is commencing.    -   b. Then decompose the graph-text documents by an operational        decomposing digitizing system and create individual cryptic        patterns corresponding to different digital reader functions,        and also create the complete cryptic document of the cryptic        graph-text function.    -   c. The individual cryptic patterns and the complete cryptic        document are printed on the surfaces of the reader sheets and        the printed sheet, respectively, and form the high-density dot        group on each surface. It is also possible to superimpose the        decomposed cryptic documents. Thus, the dot groups are        overlapped, the colors and patterns are mixed together. The        sizes, shapes, direction and spacing of the dots are all        different, thus the compressed cryptic document is unable to be        separated again and is also unable to be scanned completely.        Hence the crypto guard is attained. The informational capacity        and the contrast of the cryptic document are also very good.

The advantages of the present invention over the prior art are:

-   -   1. The way of discrimination is intuitive, simple, speedy and        easy to be spread. It can be used in different environments and        with different light sources.    -   2. The technique comprises of many different kinds of crypto        guard and is difficult to imitate. As the content of one cryptic        graph-text document is corresponding to several digital readers,        one can read corresponding documents on the same cryptic        document sheet with different readers. Thus the number of levels        of the cryptic anti-counterfeiting pattern (document) is        increased and the composed cryptic pattern is unable to be        decomposed. The imitator is unable to separate any layer of the        composed cryptic pattern or the digital readers. The crypto        guard stands more safely against the imitators.    -   3. The results are kept safe, durable, and true. If the cryptic        patterns and digital readers are timely changed, the results can        be kept more safe. That is more useful for famous products.    -   4. The results can be read visually or by computer.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the composition of the crypticgraph-text pattern discrimination system.

FIG. 2 is a schematic diagram of grid shape miniaturized lenses of thedigital reader.

FIG. 3 is a schematic diagram of step-shaped miniaturized lenses of thedigital reader.

FIG. 4 is a schematic diagram of wavelike arranged miniaturized lensesof the digital reader.

FIG. 5 is a schematic diagram of specially arranged miniaturized lensesof the digital reader.

FIG. 6 is a schematic diagram of transparent holes of the digitalreader.

FIG. 7 is a flow diagram of the producing procedure of the crypticgraph-text pattern discrimination system.

PREFERRED EMBODIMENTS OF THE INVENTION

The present invention will be described more detail by reference to theappended drawings.

As shown in FIG. 1, the cryptic graph-text pattern discrimination systemcomprises printed sheet 1 and the matched digital reader 2. The completecryptic document comprising the digitized individual cryptic graph-textpatterns are printed on the surface of the cryptic document sheet. Theappearance of the complete cryptic document is just the high-density dotgroup 3. The material of the printed sheet can be transparent,translucent or non-transparent.

When the matched digital reader 2 is covered on the surface of printedsheet 1, one can look through the lenses and see the original documenton the printed sheet 1. If the visual angle is rotating around the axisfrom 0 to 360 degrees, the pattern read is alternating from visible toinvisible and from light to heavy. When different readers 2 are coveredon the surface of the same document sheet different documents are read.

If the material of the printed sheet 1 is transparent or translucent,the digital dot group 3 can be fixed on both side of the printed sheet 1by double side pressing or rolling. Due to the refraction and reflectionof transparent light, one can see some cryptic patterns on sheet 1 andwhen a matched reader 2 is covered on it one can see some other crypticpatterns.

As shown in FIGS. 2 through 6, the surface of the reader 2, as a wholeor divided into several parts, are covered by different kinds ofomni-directional lens arrays and the surface of the vein is uneven orsmooth and many miniaturized lenses with specific focal lengths aredistributed on it. All arrays are fixed with convex lenses or holes orboth of them. The lenses/holes are arranged in accordance with thehigh-density dot group 3 of one of the individual cryptic patterns andwhich is digitized beforehand. The lenses can be in grid arrangement orin step-shaped or in wavelike pattern or with special combination. Asshown in FIG. 5, the shapes and the sizes of individual lens and thepole coordination and the polar angle of the arrangement, the spacing,and the focal lengths of the lenses can all be adjusted when needed. Theomni-directional lens array used is different from those of parallelcylindrical grating. The material, transparency, refractive index, andthe composition of colors can all be changed and create specificcombinations. The control of the parameters of the crypticanti-counterfeiting products is highly arbitrary and unique, and thereverse engineering of the parameters is impossible. It is easy todefine the parameters and produce the products. The decomposition,imitation and reproduction are very difficult. Even the pattern of thecopy reproduced looks very similar to the real one, but the smalldifference of the parameters will cause the changes of the focal lengthand the focus, thus the pattern would be blurred and the contrast becomeworse and part of the document would be missing when read the crypticdocument through a digital reader 2.

Digital readers 2 are made of transparent or translucent material suchas plastic or colloid and the plastic material may be PET, PVC, PC, PE,ABS and PP. In order to prevent the reproduction of the digital readers2, some cryptic patterns can be fixed on the surface near the edge andanother digital reader can read these patterns.

The appearance of the digital reader is like a credit card or any otherform. It can be a rigid card or a flexible one. For a rigid card, it iseasy to be carried and checked, and a flexible card conforms to curvesurfaces.

As shown in FIG. 7, the producing method of the system fordiscrimination of cryptic graph-text document is: the system includesthe printed sheet 1 and the matched digital reader 2.Enciphering/digitizing the visible and cryptic graph-text documents stepby step by the use of randomly generated enciphering system, results inthe digital graph-text document. Enciphering parameters of themultivariate function are assigned in each step and then the parametersare deleted before the next step is commencing for the sake of keepingsecrecy. Then, decompose the graph-text documents by the operationaldecomposing digitizing system and create different individual crypticpatterns for the corresponding digital reader functions and the completecryptic document for the cryptic document function, respectively. Then,fix the documents on the surfaces of the digital reader 2 and printedsheet 1, respectively, and form the high-density dot groups by the useof high-precision optical output instruments. Then superimpose thedecomposed cryptic graph-text documents so that the multi-dot groups areoverlapped. The colors and patterns are mixed together. The sizes,shapes, directions and spacing of the dots are all different. Thecryptic document is thus created with numerous parameters.

The relationship of above-mentioned individual cryptic patterns and thecomplete cryptic document can be expressed as follows:

-   -   the enciphering system is M=f(a)×f(b)× . . . ×f(n)    -   Again suppose M(a, b, . . . n)=f(a, b, . . . n)×N(a, b, . . . n)        -   =Ma+Mb . . . Mn        -   =fa(Na)+fb(Nb)+ . . . +fn(Nn)            Mn is the individual cryptic pattern of the decomposed            digital reader. Nn is the N^(th) individual cryptic document            of the complete cryptic document.    -   fa(Na)+fb(Nb)+ . . . +fn(Nn)=f(a, b . . . n)×N(a, b . . . n)        That is: The complete cryptic document is the sum of the        individual cryptic document.

The method of making a printed sheet with the cryptic graph-textdocument and a digital reader with the cryptic pattern on the surfacesis as follows:

Suppose that, the 1^(st) individual cryptic graph-text document is A

-   -   the 2^(nd) individual cryptic graph-text document is B    -   the N^(th) individual cryptic graph-text document is N    -   and N can approach infinity.

With reference to FIG. 7, digitizing the cryptic graph-text document A,B and the visible graph-text document is as follows: Firstly, input theoperational digitizing system of document: enciphering and executing thedigitizing process. Secondly, enter the operational decomposingdigitizing system and sort the graph-text documents, resulting in theindividual pattern of the digital reader A′ and B′ and the completecryptic graph-text document of the cryptic graph-text documents. By theuse of high-precision optical output instruments, the individual crypticpattern of the digital reader A′ is fixed on the surface of the digitalreader A′, the individual cryptic pattern of the digital reader B′ isfixed on the surface of the digital reader B′; and the complete crypticgraph-text document of the cryptic graph-text documents is fixed on thesurface of the printed sheet. If the digital reader A′ is covered on theright position and the right orientation of the printed sheet, theindividual document A is revealed and if the digital reader B′ iscovered on the right position and the right orientation of the printedsheet, the individual document B is revealed.

The same cryptic document or two different cryptic documents can befixed on both sides of one printed sheet.

The technique of fixing the cryptic document onto the surface of thedocument sheet is by printing, silk-screen printing, electronic printer,gilding press, heat pressing, biting in, photo etching, hologram,stamping, thermoplastic technique, transcription, and so on.

In order to enhance the concealment of the anti-counterfeiting products,more than one cryptic document can be placed on the surface of a printedsheet and the same number of readers are also used to read thecorresponding documents on that printed sheet.

The anti-counterfeiting products are suitable to many applications suchas ID cards, permits for admission, different passes and licenses,passports, credit cards, intelligent cards, different magnetic cards,computer software, hard discs, LDs, stamps, money notes, bills, checks,receipts, birth certificates, contracts, permits, documents for clearingcustoms, and packages of famous products that need anti-counterfeitingmeasure.

A method of making printed sheet with cryptic graph-text documents, anddigital readers on both sides is as follows:

As described above and is shown in FIG. 7, the material of the printedsheet is transparent or translucent and cryptic documents are fixed onboth sides of the sheet. The technique of fixing the cryptic documentson both sides of the printed sheet is by rolling or by pressing. Due tothe refraction and the reflecting of the transparent light, a specialpattern can be seen on the printed sheet itself, suggesting that theprinted sheet is already carrying the cryptic documents. If thecorresponding digital reader is covered on the printed sheet, a certaindocument is revealed. This product can be applied as the sealing stripsfor package, sealing labels for bottles. and the envelopes of differentcredentials.

One can read the revealed document either with the naked eye or by theautomatic mode discrimination system of the computer. For example: storethe special digitized discrimination data of the digital reader in thecomputer beforehand, then input the cryptic document from the printedsheet to the computer, then let the computer compare the effectivedigital code collected with the data stored at each corresponding point,by the use of a scanner (use visible light, ultra violet, infrared, orX-ray), point-by-point automatically. If the comparison result is inagreement with what is preset, the result is accepted and the crypticdocument would be displayed on the computer screen.

This method can also be used to discriminate the complete crypticdocument comprising several individual cryptic documents with samenumber of special digitized discrimination data groups individually andautomatically. If each of the individual comparison result is in agreewith the specific cryptic pattern, the complete results are accepted. Bythis way, the classification of security is achieved.

Any changes and modifications based on the present invention are withinthe spirit and the scope of the protection of the present invention.

1. Discrimination system of cryptic graph-text including printed sheetand a digital reader matched, characterized in that: the surface of thesaid printed sheet is fixed with a complete cryptic graph-text document,which comprises several individual cryptic graph-text documents andpresents itself as a digital dot group with very high density and eachof said individual cryptic graph-text documents is digitized anddecomposed; said printed sheet is made of transparent, translucent ornon-transparent material; said printed sheet can also be fixed with theabove mentioned complete cryptic graph-text documents presented as thehigh density dot groups on both side and said printed sheet is made ofthe transparent or translucent material; the surface of the said digitalreader is fixed with a complete omni directional lens array or withseveral arrays on separated parts of the surface; the surface of thevein is uneven or is smooth and many miniaturized lenses with specificfocal lengths are distributed on it; and all arrays are fixed withconvex lenses or holes or both of them; the lenses are arranged inaccordance with the pattern of the high density dot groups that areformed by one of the individual cryptic graph-text pattern digitized anddecomposed, whereby the relationship of the individual crypticgraph-text documents and the complete cryptic graph-text documents canbe expressed: the enciphering system is M=f(a)×f(b)× . . . ×f(n), whereM(a,b,KK n)=f(a,b,KK n)×N(a,b,KK n)=Ma+Mb+KK+Mn=fa (Na)+fb(Nb)+KK+fn(Nn), wherein Mn is the individual cryptic graph-text documents of thedecomposed digit reader, Mn is the Nth individual cryptic graph-textdocuments of the complete cryptic graph-text documents, and fa(Na)+Fb(Nb)+KK+Fn(Nn)=f(a,b,KK n)×N(a,b,KK n), and wherein, the completecryptic graph text document is the sum of the individual crypticgraph-text documents.
 2. The discrimination system of cryptic graph-textaccording to claim 1, characterized in that: the lenses ofomni-directional lens arrays are arranged in grid pattern or instep-shaped or in wavelike pattern or with special combination.
 3. Thediscrimination system of cryptic graph-text according to claim 1,characterized in that: the digital reader is also fixed with somecryptic patterns on the surface near the edges.
 4. The discriminationsystem of cryptic graph-text according to claim 1, characterized inthat: said digital reader is made of transparent or translucentmaterial.
 5. The discrimination system of cryptic graph-text accordingto claim 4, characterized in that: said transparent or translucentmaterial of said digital reader is plastic or colloid.
 6. Thediscrimination system of cryptic graph-text according to claim 1,characterized in that: said digital reader is of rigid card or flexiblecard.
 7. The discrimination system of cryptic graph-text according toclaim 1, characterized in that: said printed sheet can be fixed to thelicenses, certificates, sealing strips, credit cards, different magneticcards, intelligent cards, computer software, hard discs, LD, stamps,money notes, bills, receipts, birth certificates, contracts, permits,documents for clearing customs, packages of products, or on the surfacesof porcelain, metal, died plastic articles, wooden articles and dressmaterial.